AirHint found the following cheapest return flights from Istanbul (IST) to Keflavik (KEF) in October 2025 (see full year).

Return flights

22 Oct - 26 Oct	Norwegian
08 Oct - 16 Oct	Wizz Air UK
03 Oct - 06 Oct	Wizz Air UK
29 Oct - 02 Nov	Wizz Air UK
27 Oct - 02 Nov	Wizz Air UK
03 Oct - 05 Oct	Wizz Air UK
28 Oct - 02 Nov	Wizz Air UK
14 Oct - 19 Oct	Wizz Air UK
09 Oct - 12 Oct	Wizz Air UK
03 Oct - 12 Oct	Wizz Air UK
01 Oct - 07 Oct	Wizz Air
02 Oct - 05 Oct	Wizz Air UK
08 Oct - 08 Oct	Wizz Air UK
30 Oct - 02 Nov	Wizz Air UK
27 Oct - 02 Nov	Icelandair	direct

Also check the deals for one-way flights from Istanbul to Keflavik in October.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest return flights from Istanbul to Keflavik in October from 215€

Return flights